package com.sky.service.impl;

import com.sky.dto.GoodsSalesDTO;
import com.sky.entity.Orders;
import com.sky.mapper.OrderMapper;
import com.sky.mapper.UserMapper;
import com.sky.service.ReportService;
import com.sky.service.WorkspaceService;
import com.sky.vo.*;
import org.apache.commons.lang3.StringUtils;
import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.InputStream;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

/**
 * @version 1.0
 * @Author 郭腾高
 * @Date 2024/10/8 21:01
 */
@Service
public class ReportServiceImpl implements ReportService {
    @Autowired
    private OrderMapper orderMapper;
    @Autowired
    private UserMapper userMapper;
    @Autowired
    private WorkspaceService workspaceService;
    /*
    * 营业额统计
    * */
    public TurnoverReportVO getTurnoverStatistics(LocalDate begin, LocalDate end) {
        //先获得日期区间
       List<LocalDate> localDates = new ArrayList<>();
       localDates.add(begin);
       while (!begin.equals(end)){
           begin = begin.plusDays(1);
           localDates.add(begin);
       }
       localDates.add(end);
       //遍历日期并查询对应当天的已完成订单，将金额相加得到当天营业额
       //select num(amount) from order where order_time>? and order_Time<? and status = 5;
        List<Double> turnoverList = new ArrayList();
        for (LocalDate localDate : localDates) {
            LocalDateTime beginTime = LocalDateTime.of(localDate, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(localDate, LocalTime.MAX);
            Map map = new HashMap();
            map.put("begin",beginTime);
            map.put("end",endTime);
            map.put("status", Orders.COMPLETED);
            Double amount = orderMapper.getDayAmount(map);
            //如果当天营业额为空则将其设为0再加入
            if (amount==null){
                amount=0.0;
            }
            turnoverList.add(amount);
        }
        // 将当天营业额加入到集合中


        return TurnoverReportVO.builder()
                .dateList(StringUtils.join(localDates,","))
                .turnoverList(StringUtils.join(turnoverList,","))
                .build();
    }
    /*
    * 用户统计
    * */
    @Override
    public UserReportVO getUserStatistics(LocalDate begin, LocalDate end) {
        //先获得日期区间
        List<LocalDate> localDates = new ArrayList<>();
        localDates.add(begin);
        while (!begin.equals(end)){
            begin = begin.plusDays(1);
            localDates.add(begin);
        }



        //遍历日期，查询User表
        //select sum(id) from user where order_time>? and order_Time<?;
        List<Integer> totalUserList = new ArrayList();
        List<Integer> newUserList = new ArrayList();
        for (LocalDate localDate : localDates) {
            LocalDateTime beginTime = LocalDateTime.of(localDate, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(localDate, LocalTime.MAX);
            Map map = new HashMap();
            map.put("end",endTime);
            Integer Alluser = userMapper.getUserNumber(map);
            map.put("begin",beginTime);
            Integer Newuser = userMapper.getUserNumber(map);
            totalUserList.add(Alluser);
            newUserList.add(Newuser);
        }
        return UserReportVO.builder()
                .dateList(StringUtils.join(localDates,","))
                .totalUserList(StringUtils.join(totalUserList,","))
                .newUserList(StringUtils.join(newUserList,","))
                .build();
    }
    /*
    * 订单统计
    * */
    @Override
    public OrderReportVO getOrderStatistics(LocalDate begin, LocalDate end) {
        //先获得日期区间
        List<LocalDate> localDates = new ArrayList<>();
        localDates.add(begin);
        while (!begin.equals(end)){
            begin = begin.plusDays(1);
            localDates.add(begin);
        }
        //遍历日期，查询order表,查两次得到当天订单总数和有效订单数
        //select count(id) from order where order_time>? and order_Time<? and status =5;
        //每日订单的总数
        List<Integer> totalOrderList = new ArrayList();
        //每日的有效订单数
        List<Integer> effectiveOrderList = new ArrayList();
        for (LocalDate localDate : localDates) {
            LocalDateTime beginTime = LocalDateTime.of(localDate, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(localDate, LocalTime.MAX);
            Integer totalNumber = getNumber(beginTime, endTime, null);
            Integer effectiveNumber = getNumber(beginTime, endTime, Orders.COMPLETED);
            totalOrderList.add(totalNumber);
            effectiveOrderList.add(effectiveNumber);
        }
        //遍历每日订单总数相加得到订单总数
        Integer totalOrderCount = 0;
        for (Integer integer : totalOrderList) {
            totalOrderCount +=integer;
        }
        //遍历每日订单有效数相加得到有效订单总数
        Integer validOrderCount = 0;
        for (Integer integer : effectiveOrderList) {
            validOrderCount +=integer;
        }
        Double orderCompletionRate = 0.0;
        //计算订单完成率
        if (totalOrderCount!=0){
            orderCompletionRate = validOrderCount/totalOrderCount.doubleValue();
        }
        return OrderReportVO.builder()
                .dateList(StringUtils.join(localDates,","))
                .orderCountList(StringUtils.join(totalOrderList,","))
                .validOrderCountList(StringUtils.join(effectiveOrderList,","))
                .totalOrderCount(totalOrderCount)
                .validOrderCount(validOrderCount)
                .orderCompletionRate(orderCompletionRate)
                .build();
    }
    //创建订单统计方法
    public Integer getNumber(LocalDateTime begin,LocalDateTime end,Integer status){
        Integer number = orderMapper.getOrderNumber(begin,end,status);
        return number;
    }
    /*
    * top10
    * */
    @Override
    public SalesTop10ReportVO top10(LocalDate begin, LocalDate end) {
        LocalDateTime beginTime = LocalDateTime.of(begin, LocalTime.MIN);
        LocalDateTime endTime = LocalDateTime.of(end, LocalTime.MAX);
        List<GoodsSalesDTO> salesTop10= orderMapper.top10(beginTime,endTime);
        //菜品名称
        List nameList = new ArrayList();
        //销量数量
        List numberList = new ArrayList();
        for (GoodsSalesDTO goodsSalesDTO : salesTop10) {
            String name = goodsSalesDTO.getName();
            Integer number = goodsSalesDTO.getNumber();
            nameList.add(name);
            numberList.add(number);
        }

        return SalesTop10ReportVO.builder()
                .nameList(StringUtils.join(nameList,","))
                .numberList(StringUtils.join(numberList,","))
                .build();
    }
    /*
     * 导出Excel报表
     * */
    @Override
    public void exportBusinessDate(HttpServletResponse response) {
        //1. 查询数据库，获取营业数据---查询最近30天的运营数据
        LocalDate dateBegin = LocalDate.now().minusDays(30);
        LocalDate dateEnd = LocalDate.now().minusDays(1);

        //查询概览数据
        BusinessDataVO businessDataVO = workspaceService.getBusinessData(LocalDateTime.of(dateBegin, LocalTime.MIN), LocalDateTime.of(dateEnd, LocalTime.MAX));

        //2. 通过POI将数据写入到Excel文件中
        InputStream in = this.getClass().getClassLoader().getResourceAsStream("template/运营数据报表模板.xlsx");

        try {
            //基于模板文件创建一个新的Excel文件
            XSSFWorkbook excel = new XSSFWorkbook(in);

            //获取表格文件的Sheet页
            XSSFSheet sheet = excel.getSheet("Sheet1");

            //填充数据--时间
            sheet.getRow(1).getCell(1).setCellValue("时间：" + dateBegin + "至" + dateEnd);

            //获得第4行
            XSSFRow row = sheet.getRow(3);
            row.getCell(2).setCellValue(businessDataVO.getTurnover());
            row.getCell(4).setCellValue(businessDataVO.getOrderCompletionRate());
            row.getCell(6).setCellValue(businessDataVO.getNewUsers());

            //获得第5行
            row = sheet.getRow(4);
            row.getCell(2).setCellValue(businessDataVO.getValidOrderCount());
            row.getCell(4).setCellValue(businessDataVO.getUnitPrice());

            //填充明细数据
            for (int i = 0; i < 30; i++) {
                LocalDate date = dateBegin.plusDays(i);
                //查询某一天的营业数据
                BusinessDataVO businessData = workspaceService.getBusinessData(LocalDateTime.of(date, LocalTime.MIN), LocalDateTime.of(date, LocalTime.MAX));

                //获得某一行
                row = sheet.getRow(7 + i);
                row.getCell(1).setCellValue(date.toString());
                row.getCell(2).setCellValue(businessData.getTurnover());
                row.getCell(3).setCellValue(businessData.getValidOrderCount());
                row.getCell(4).setCellValue(businessData.getOrderCompletionRate());
                row.getCell(5).setCellValue(businessData.getUnitPrice());
                row.getCell(6).setCellValue(businessData.getNewUsers());
            }

            //3. 通过输出流将Excel文件下载到客户端浏览器
            ServletOutputStream out = response.getOutputStream();
            excel.write(out);

            //关闭资源
            out.close();
            excel.close();
        } catch (IOException e) {
            e.printStackTrace();
        }

    }



}
